Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 387,256	$ 303,087
Total revenues from contracts with customers	373,703
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	360,085
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,618
Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	373,703
Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,553
Marketing
Disaggregation of Revenue [Line Items]
Total revenues	373,638
Total revenues from contracts with customers	360,085
Marketing | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	360,085
Marketing | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0
Marketing | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	360,085
Marketing | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,553
Transportation
Disaggregation of Revenue [Line Items]
Total revenues	13,618
Total revenues from contracts with customers	13,618
Transportation | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0
Transportation | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,618
Transportation | Revenues from contracts with customers
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	13,618
Transportation | Other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 0